<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>课程详情</title>
</head>

<body>
    <!-- 详情 -->
    <div class="datail">
        <!-- 视频预览 -->
        <img class="video-box" src="#" alt="">
        <!-- 返回上一级箭头 -->
        <p class="lt">&lt;</p>
    </div>

    <!-- 开始训练按钮 -->
    <div class="start-btn">
        <a href="exercising_course_play.html" id="btn">开始训练</a>
    </div>
</body>

</html>